Rockwell Automation 1771-OD16 AC (120V) ISO Output Installation Instructions - Manual

Publication 1771Ć5.21 -February 1997
AC (120V) Isolated Output
Module, 16 Outputs
Cat. No. 1771-OD16 Series B
This document provides information on:
•
important pre-installation considerations
•
power supply requirements
•
installing the module
•
using the module indicators for troubleshooting
•
replacing a fuse
•
module specifications
An output from this module can drive an Allen-Bradley Size 5 motor
starter, provided its supply voltage does not drop below 92V ac. The
maximum load current the module can deliver is 2A per channel, not
to exceed 8A total per module.
Your module’s outputs can drive the following motor starter
combinations:
•
16 size 3 motor starters (1 per output)
•
10 size 4 motor starters (1 per output)
•
7 size 5 motor starters (1 per output)
The switching device in the output circuit is a solid-state triac. There
is a small leakage current in the off state due to both triac and
capacitive characteristics. The maximum leakage current per output
is 3mA at 138V ac. Nominal leakage current is 1.5mA. The on-state
voltage drop across the output terminals will not exceed 1.5V ac
at 2A.
The 1771-OD16/B module is designed for a 5mA minimum current
on each output circuit. The total continuous current the module
supports is 8A (2A maximum per channel).
!
ATTENTION: If the 8A maximum per module (2A
per module) rating is exceeded, the module overheats
and damage may occur.
The module uses zero voltage turn-on to reduce the electromagnetic
interference and high inrush currents during initial turn-on. This zero
crossing feature switches line voltage only when it is close to zero.
The typical value for zero crossing voltage is +15V ac.
Installation Instructions
To The Installer
PreĆinstallation
Considerations